web: bump country-flag-icons from 1.5.11 to 1.5.12 in /web

Bumps [country-flag-icons](https://gitlab.com/catamphetamine/country-flag-icons) from 1.5.11 to 1.5.12.
- [Changelog](https://gitlab.com/catamphetamine/country-flag-icons/blob/master/CHANGELOG.md)
- [Commits](https://gitlab.com/catamphetamine/country-flag-icons/compare/v1.5.11...v1.5.12)

---
updated-dependencies:
- dependency-name: country-flag-icons
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

web/package.json

@@ -54,7 +54,7 @@
         "codemirror": "^6.0.1",
         "construct-style-sheets-polyfill": "^3.1.0",
         "core-js": "^3.37.1",
-        "country-flag-icons": "^1.5.11",
+        "country-flag-icons": "^1.5.12",
         "fuse.js": "^7.0.0",
         "guacamole-common-js": "^1.5.0",
         "lit": "^3.1.3",